Comparison

Moon vs 555 Timer & Oscillators Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Moon

Features
Read full description

Experience the Moon: Apollo — The Greatest Adventure in History, Reimagined. Step into the boots of an astronaut and explore the legendary Apollo missions. Our goal is to bring the breathtaking achievements of the Apollo program to your fingertips with a modern, high-definition experience. Navigate through hundreds of stunning, curated NASA photos and immersive video archives. Whether you are a space enthusiast or a curious explorer, "Moon: Apollo" provides a window into the most significant milestone in human history. HIGHLIGHT FEATURES: MODERN BROWSE: Explore hundreds of high-res photos with detailed historical records and a powerful new search engine. IMMERSIVE SLIDESHOW: Beautiful fullscreen imagery that makes you feel like you are in lunar orbit. Experience automatic playback with curated info at your touch. DYNAMIC GALLERY: A visually stunning interactive grid. Zoom into details with fluid gestures and high-definition clarity. RARE VIDEO ARCHIVE: Watch the historic moments as they happened. Our improved video player ensures a seamless viewing experience of humanity's lunar steps. INTERACTIVE MISSIONS: Access real-time mission data and deep dives into the legacy of each Apollo flight. PREMIUM DESIGN: Enjoy a state-of-the-art UI with glassmorphism aesthetics, fluid animations, and refined haptic feedback designed specifically for iOS. Join us in celebrating the spirit of exploration. The Moon is waiting.

About

555 Timer & Oscillators Pro

Features
Read full description

Master the design of oscillators and waveform generators using 555 timer integrated circuits, digital logic integrated circuits, operational amplifiers, and transistors. The application provides a comprehensive collection of over 130 tutorials and circuit diagrams, covering 555 timer circuits and practical applications, CMOS 4000 series logic oscillators, TTL 74LS and 74HC series oscillators, operational amplifier–based waveform generators, and transistor multivibrators. Designed for electronics beginners, students, hobbyists, and professional engineers, the app serves as a complete reference and learning tool for designing, understanding, and building oscillators, multivibrators, pulse generators, and waveform circuits commonly used in both analog and digital electronics. In addition to tutorials and schematics, the app includes built-in calculators for frequency, timing, duty cycle, and component value estimation, helping users quickly calculate and adjust circuit parameters. All topics are presented with clear circuit diagrams and detailed explanations. Available in 14 Languages: • English, French, German, Indonesian, Italian, Japanese, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Turkish, Ukrainian, and Vietnamese — study in your native language! Covered Topics: • 555 Timer IC Series • Astable, monostable, and bistable modes • Pulse Width Modulation (PWM) • Voltage conversion circuits • Sensor and external module interfacing • CMOS Logic Oscillators • CMOS 4000 series circuits • Astable, monostable, and bistable modes • Gated CMOS oscillators • TTL / HC Logic Oscillators • TTL 74LS series circuits • 74HC series logic oscillators • Astable and monostable modes • Operational Amplifier Oscillators • Sine wave generators • Square-wave pulse generators • Triangle wave generators • Transistor-Based Oscillators • Transistor-Based Astable multivibrators • Transistor-Based Monostable multivibrators The Pro edition provides additional tools for faster learning and easy navigation: • Full-text search across all lessons and components • Favorites for saving and organizing important topics The content is regularly updated and expanded with each new release, ensuring the latest tutorials and circuit examples are always available.

Screenshots

Moon4 screens
555 Timer & Oscillators Pro4 screens

Verdict

The call

The clearest difference is update cadence: 555 Timer & Oscillators Pro at every 2 months against Moon's every 26 months. Moon's advantage is price ($0.99 vs $4.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Moon costs $0.99 and 555 Timer & Oscillators Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Moon ships an update every 26 months, 555 Timer & Oscillators Pro every 2 months. The most recent releases landed on October 1, 2026 and October 19, 2026 respectively.

Scorecard2 real differences · 4 level
Moon versus 555 Timer & Oscillators Pro: the parameters behind the verdict, then further details
ParameterMoon555 Timer & Oscillators Pro
Price$0.99 — better$4.99
Update frequencyEvery 26 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, MaciPhone, iPad, Mac
Requires iOS17.617.0 — better
Further details — not scored
Size1.4 GB22 MB
Age rating9+4+
DeveloperAlparslan TopbasALG Software Lab

In-app purchases

None

Moon

No in-app purchases

None

555 Timer & Oscillators Pro

No in-app purchases

Questions

Is Moon free?
Moon costs $0.99, with no in-app purchases.
Is 555 Timer & Oscillators Pro free?
555 Timer & Oscillators Pro costs $4.99, with no in-app purchases.
Do Moon or 555 Timer & Oscillators Pro have ads?
Neither Moon nor 555 Timer & Oscillators Pro shows ads.
Which is updated more often, Moon or 555 Timer & Oscillators Pro?
Moon ships an update every 26 months, and 555 Timer & Oscillators Pro every 2 months. Most recently, Moon was updated on October 1, 2026 and 555 Timer & Oscillators Pro on October 19, 2026.

Other comparisons